Tupac Sex Tape Sold

(TMZ) Tupac Shakur's 1991 sex tape is officially off the market -- TMZ has learned, the XXX footage has been sold to a private collector.

Sources connected to the deal tells us, the former tape owner decided not to sell to a big company out of principle -- claiming the corporate porn fat cats were "parasites."

No word on what it sold for ... but as we previously reported, bids for the background music alone -- an original, unreleased Tupac track -- had reached $1,000,000.

Maybe next time, folks ... though we wouldn't hold our breath -- a rep for the Tupac estate tells us, it plans to block any future sale of the tape ... and make sure the tape never sees the light of day. more on this story